+ /*
+ * The dump device does not support gang blocks so allocation on
+ * behalf of the dump device (i.e. ZIO_FLAG_NODATA) must avoid
+ * the "fast" gang feature.
+ */
+ flags |= (zio->io_flags & ZIO_FLAG_NODATA) ? METASLAB_GANG_AVOID : 0;
+ flags |= (zio->io_flags & ZIO_FLAG_GANG_CHILD) ?
+ METASLAB_GANG_CHILD : 0;